dysmenorrhoea in British English
or especially US dysmenorrhea (ˌdɪsmɛnəˈrɪə, dɪsˌmɛn-)
nounabnormally difficult or painful menstruation
Derived forms
dysmenorrhoeal (ˌdysmenorˈrhoeal) or especially US dysmenorrheal (ˌdysmenorˈrheal) adjective
Word origin
C19: from
dys- + Greek
mēn month +
rhoiā a flowing